hmat_get_ex...r_cache_size(9)

💅 hmat_get_extended_linear_cache_size 💅

okay so bestie, welcome to the Kernel API Manual — yes, the Kernel API Manual, we're doing big-kid kernel stuff today and honestly? you're gonna slay this one. this page is literally called hmat_get_ex...r_cache_size(9) in the header because man page headers truncate and honestly it's giving "contact name saved as a whole sentence" energy 😭 but the real, full, un-abbreviated name is down below, promise 🫶

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✨ NAME ✨

hmat_get_extended_linear_cache_size — retrieve the extended linear cache size. that's it. that's the whole job. it retrieves, it's extended, it's linear, it's a cache size. iconic behavior, no notes 💅

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✨ SYNOPSIS ✨

int hmat_get_extended_linear_cache_size (struct resource *backing_res ,
int nid , resource_size_t *cache_size );

look at her. three params, int return, clean lines. we love a signature that knows what it wants 💖

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✨ ARGUMENTS ✨

• backing_res — the resource from the backing media, like, the actual physical-ish thing the cache is backing onto. that's your main character.
• nid — the node id for the memory region. just tell her which node, she's not a mind reader bestie 🧚
• cache_size — this one's an Output param, meaning she writes into it: the size of the extended linear cache. so you pass the pointer and she fills it in for you. teamwork!! 🎀

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✨ RETURN ✨

• 0 on success 🎉 (the good ending)
• Errno on failure 💀 (the "something went sideways, check your errno" ending)

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✨ SEE ALSO ✨

• Kernel file ./drivers/acpi/numa/hmat.c — go read the source, iykyk 🔥
• acpi_get_genport_coordinates(9) — another page in the same little friend group 🌸

ngl the whole "extended linear cache" thing lives over in the ACPI NUMA / HMAT corner of the kernel, so if you're lost, that's your neighborhood bestie 🦋

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so yeah, that's the whole page, short and sweet, lowkey a vibe check pass with flying colors ⭐

sign-off time 🎀 this little beauty comes from ./drivers/acpi/numa and it's dated October 2026 — so yeah, she's from the future, obviously she's ahead of the game 👑✨